** Shares of Perenti PRN.AX rise ~2% to A$1.060; set for
their biggest pct gain since Sept. 25, if current trend holds
** Diversified mining co announces a renewed on-market
buyback program limited to 12 months and will buy shares
whenever it deems "appropriate"
** Says the buyback will not require shareholder approval
** PRN has 938.2 mln shares outstanding for a ~A$981 mln
($667.4 mln) market cap and 769.2 mln shares of free float, per
LSEG data
($1 = 1.4699 Australian dollars)
(Reporting by Kumar Tanishk in Bengaluru)
((Tanishk.Kumar@thomsonreuters.com;))